How to call C ++ managed methods from Un-managed C ++

PLEASE SEE UPDATE BELOW

(RESOLVED) I also extended this to the second question here Implement a C # DLL COM file in an unmanaged C ++ program

I researched this to the end of the Internet, I find no real, understandable, human example of how to do this.

I have a C # DLL that encrypts and decrypts text.

I do not want / do not have the intellectual ability to rewrite this in C ++ unmanaged code. So instead, I created a C ++ / CLR class that interacts with the C # dll.

NOW I need to know how to call managed C ++ from my unmanaged code.

Here is my managed code and it is verified that it works

// clrTest.cpp : main project file.

#include "cSharpRiJHarn"
#include "stdafx.h"
#include <string>
#include <stdio.h>

using namespace cSharpRiJHarn;
using namespace System;


String^ Encrypt(String ^s)
{
    return  RijndaelLink::encrypt(s);   
}


String^ Decrypt(String ^s)
{
    return  RijndaelLink::decrpyt(s);   
}

int main()
{   
     //Console::WriteLine(Encrypt("It Works"));

     //Console::WriteLine(Decrypt(Encrypt("It Works")));

     //Console::ReadLine();
     return 0;
}

Now, once again, I explored this.

I saw all the erroneous / overly complex explanations

, - COM Interop

, , .

.

UPDATE

DLL # COM

using System;
using System.Runtime.InteropServices;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace cSharpRiJHarn
{
    [Guid("GuiD CODE REMOVED")]
    public interface DBCOM_Interface
    {
        [DispId(1)]
        String encrypt(string s);
        [DispId(2)]
        String decrpyt(string s);
    }

    [Guid("GuiD CODE REMOVED"),
    InterfaceType(ComInterfaceType.InterfaceIsIDispatch)]
    public interface DBCOM_Events
    {
    }

    [Guid("GuiD CODE REMOVED"),
    ClassInterface(ClassInterfaceType.None),
    ComSourceInterfaces(typeof(DBCOM_Events))]
    public class RijndaelLink : DBCOM_Interface
    {
        public String encrypt(String s)
        {
            return Rijndael.EncryptString(s); 
        }
        public String decrpyt(String s)
        {
            return Rijndael.DecryptString(s);
        }
    }
}

, ++... ++, cSharpRiJHarn . .

#import "cSharpRiJHarn" 
#include "stdafx.h"
#include <string>
#include <stdio.h>
#include <iostream>
//using namespace cSharpRiJHarn;


int main(){

    cSharpRiJHarn::RijndaelLink::encrypt("It works");
    char ch;
    std::cin>>ch;
    return 0;
}

, .

6 C2653: 'cSharpRiJHarn':

8 IntelliSense: "C:/.../...//Visual Studio 2010//unmannagedCPPExample/unmannagedCPPExample/Debug/cSharpRiJHarn.tlh" c:......\documents\visual 2010\Projects\unmannagedcppexample\unmannagedcppexample\unmannagedcppexample.cpp